Jonathan Oxer, over at SuperHouseTV, has been running a series of video episodes on the Sonoff product line recently and I really recommend his latest. The theme of the video is Sonoff-specific hints and hint #1 is how to upgrade the memory chip in a Sonoff. Jonathan does a great job of demonstrating how to remove the chip with nothing more than “a big, old, clunky soldering iron” and a screwdriver. A picture is worth a thousand words, so you need to multiply that by whatever the frame rate of a YouTube video is. Watch it! It’s worth it.